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Merge branch 'akpm'
[linux-2.6/next.git] / fs / nfsd / nfs4proc.c
blob50bae747114752e656198b0006044e4e7cfea58e
1 /*
2 * Server-side procedures for NFSv4.
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35 #include <linux/file.h>
36 #include <linux/slab.h>
37
38 #include "cache.h"
39 #include "xdr4.h"
40 #include "vfs.h"
41
42 #define NFSDDBG_FACILITY NFSDDBG_PROC
43
44 static u32 nfsd_attrmask[] = {
45 NFSD_WRITEABLE_ATTRS_WORD0,
46 NFSD_WRITEABLE_ATTRS_WORD1,
47 NFSD_WRITEABLE_ATTRS_WORD2
48 };
49
50 static u32 nfsd41_ex_attrmask[] = {
51 NFSD_SUPPATTR_EXCLCREAT_WORD0,
52 NFSD_SUPPATTR_EXCLCREAT_WORD1,
53 NFSD_SUPPATTR_EXCLCREAT_WORD2
54 };
55
56 static __be32
57 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
58 u32 *bmval, u32 *writable)
59 {
60 struct dentry *dentry = cstate->current_fh.fh_dentry;
61
62 /*
63 * Check about attributes are supported by the NFSv4 server or not.
64 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
65 */
66 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
67 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
68 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
69 return nfserr_attrnotsupp;
70
71 /*
72 * Check FATTR4_WORD0_ACL can be supported
73 * in current environment or not.
74 */
75 if (bmval[0] & FATTR4_WORD0_ACL) {
76 if (!IS_POSIXACL(dentry->d_inode))
77 return nfserr_attrnotsupp;
78 }
79
80 /*
81 * According to spec, read-only attributes return ERR_INVAL.
82 */
83 if (writable) {
84 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
85 (bmval[2] & ~writable[2]))
86 return nfserr_inval;
87 }
88
89 return nfs_ok;
90 }
91
92 static __be32
93 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
94 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
95 {
96 __be32 status = nfs_ok;
97
98 if (open->op_create == NFS4_OPEN_CREATE) {
99 if (open->op_createmode == NFS4_CREATE_UNCHECKED
100 || open->op_createmode == NFS4_CREATE_GUARDED)
101 status = check_attr_support(rqstp, cstate,
102 open->op_bmval, nfsd_attrmask);
103 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
104 status = check_attr_support(rqstp, cstate,
105 open->op_bmval, nfsd41_ex_attrmask);
106 }
107
108 return status;
109 }
110
111 static int
112 is_create_with_attrs(struct nfsd4_open *open)
113 {
114 return open->op_create == NFS4_OPEN_CREATE
115 && (open->op_createmode == NFS4_CREATE_UNCHECKED
116 || open->op_createmode == NFS4_CREATE_GUARDED
117 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
118 }
119
120 /*
121 * if error occurs when setting the acl, just clear the acl bit
122 * in the returned attr bitmap.
123 */
124 static void
125 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
126 struct nfs4_acl *acl, u32 *bmval)
127 {
128 __be32 status;
129
130 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
131 if (status)
132 /*
133 * We should probably fail the whole open at this point,
134 * but we've already created the file, so it's too late;
135 * So this seems the least of evils:
136 */
137 bmval[0] &= ~FATTR4_WORD0_ACL;
138 }
139
140 static inline void
141 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
142 {
143 fh_put(dst);
144 dget(src->fh_dentry);
145 if (src->fh_export)
146 cache_get(&src->fh_export->h);
147 *dst = *src;
148 }
149
150 static __be32
151 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
152 {
153 __be32 status;
154
155 if (open->op_truncate &&
156 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
157 return nfserr_inval;
158
159 accmode |= NFSD_MAY_READ_IF_EXEC;
160
161 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
162 accmode |= NFSD_MAY_READ;
163 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
164 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
165 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
166 accmode |= NFSD_MAY_WRITE;
167
168 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
169
170 return status;
171 }
172
173 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
174 {
175 umode_t mode = fh->fh_dentry->d_inode->i_mode;
176
177 if (S_ISREG(mode))
178 return nfs_ok;
179 if (S_ISDIR(mode))
180 return nfserr_isdir;
181 /*
182 * Using err_symlink as our catch-all case may look odd; but
183 * there's no other obvious error for this case in 4.0, and we
184 * happen to know that it will cause the linux v4 client to do
185 * the right thing on attempts to open something other than a
186 * regular file.
187 */
188 return nfserr_symlink;
189 }
190
191 static __be32
192 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
193 {
194 struct svc_fh resfh;
195 __be32 status;
196 int created = 0;
197
198 fh_init(&resfh, NFS4_FHSIZE);
199 open->op_truncate = 0;
200
201 if (open->op_create) {
202 /* FIXME: check session persistence and pnfs flags.
203 * The nfsv4.1 spec requires the following semantics:
204 *
205 * Persistent | pNFS | Server REQUIRED | Client Allowed
206 * Reply Cache | server | |
207 * -------------+--------+-----------------+--------------------
208 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
209 * | | | (SHOULD)
210 * | | and EXCLUSIVE4 | or EXCLUSIVE4
211 * | | | (SHOULD NOT)
212 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
213 * yes | no | GUARDED4 | GUARDED4
214 * yes | yes | GUARDED4 | GUARDED4
215 */
216
217 /*
218 * Note: create modes (UNCHECKED,GUARDED...) are the same
219 * in NFSv4 as in v3 except EXCLUSIVE4_1.
220 */
221 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
222 open->op_fname.len, &open->op_iattr,
223 &resfh, open->op_createmode,
224 (u32 *)open->op_verf.data,
225 &open->op_truncate, &created);
226
227 /*
228 * Following rfc 3530 14.2.16, use the returned bitmask
229 * to indicate which attributes we used to store the
230 * verifier:
231 */
232 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
233 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
234 FATTR4_WORD1_TIME_MODIFY);
235 } else {
236 status = nfsd_lookup(rqstp, current_fh,
237 open->op_fname.data, open->op_fname.len, &resfh);
238 fh_unlock(current_fh);
239 if (status)
240 goto out;
241 status = nfsd_check_obj_isreg(&resfh);
242 }
243 if (status)
244 goto out;
245
246 if (is_create_with_attrs(open) && open->op_acl != NULL)
247 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval);
248
249 set_change_info(&open->op_cinfo, current_fh);
250 fh_dup2(current_fh, &resfh);
251
252 /* set reply cache */
253 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
254 &resfh.fh_handle);
255 if (!created)
256 status = do_open_permission(rqstp, current_fh, open,
257 NFSD_MAY_NOP);
258
259 out:
260 fh_put(&resfh);
261 return status;
262 }
263
264 static __be32
265 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
266 {
267 __be32 status;
268
269 /* Only reclaims from previously confirmed clients are valid */
270 if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
271 return status;
272
273 /* We don't know the target directory, and therefore can not
274 * set the change info
275 */
276
277 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
278
279 /* set replay cache */
280 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
281 &current_fh->fh_handle);
282
283 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
284 (open->op_iattr.ia_size == 0);
285
286 status = do_open_permission(rqstp, current_fh, open,
287 NFSD_MAY_OWNER_OVERRIDE);
288
289 return status;
290 }
291
292 static void
293 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
294 {
295 struct nfsd4_sessionid *sid =
296 (struct nfsd4_sessionid *)session->se_sessionid.data;
297
298 clid->cl_boot = sid->clientid.cl_boot;
299 clid->cl_id = sid->clientid.cl_id;
300 }
301
302 static __be32
303 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
304 struct nfsd4_open *open)
305 {
306 __be32 status;
307 struct nfsd4_compoundres *resp;
308
309 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
310 (int)open->op_fname.len, open->op_fname.data,
311 open->op_stateowner);
312
313 /* This check required by spec. */
314 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
315 return nfserr_inval;
316
317 /*
318 * RFC5661 18.51.3
319 * Before RECLAIM_COMPLETE done, server should deny new lock
320 */
321 if (nfsd4_has_session(cstate) &&
322 !cstate->session->se_client->cl_firststate &&
323 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
324 return nfserr_grace;
325
326 if (nfsd4_has_session(cstate))
327 copy_clientid(&open->op_clientid, cstate->session);
328
329 nfs4_lock_state();
330
331 /* check seqid for replay. set nfs4_owner */
332 resp = rqstp->rq_resp;
333 status = nfsd4_process_open1(&resp->cstate, open);
334 if (status == nfserr_replay_me) {
335 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
336 fh_put(&cstate->current_fh);
337 fh_copy_shallow(&cstate->current_fh.fh_handle,
338 &rp->rp_openfh);
339 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
340 if (status)
341 dprintk("nfsd4_open: replay failed"
342 " restoring previous filehandle\n");
343 else
344 status = nfserr_replay_me;
345 }
346 if (status)
347 goto out;
348
349 status = nfsd4_check_open_attributes(rqstp, cstate, open);
350 if (status)
351 goto out;
352
353 /* Openowner is now set, so sequence id will get bumped. Now we need
354 * these checks before we do any creates: */
355 status = nfserr_grace;
356 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
357 goto out;
358 status = nfserr_no_grace;
359 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
360 goto out;
361
362 switch (open->op_claim_type) {
363 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
364 case NFS4_OPEN_CLAIM_NULL:
365 /*
366 * (1) set CURRENT_FH to the file being opened,
367 * creating it if necessary, (2) set open->op_cinfo,
368 * (3) set open->op_truncate if the file is to be
369 * truncated after opening, (4) do permission checking.
370 */
371 status = do_open_lookup(rqstp, &cstate->current_fh,
372 open);
373 if (status)
374 goto out;
375 break;
376 case NFS4_OPEN_CLAIM_PREVIOUS:
377 open->op_stateowner->so_confirmed = 1;
378 /*
379 * The CURRENT_FH is already set to the file being
380 * opened. (1) set open->op_cinfo, (2) set
381 * open->op_truncate if the file is to be truncated
382 * after opening, (3) do permission checking.
383 */
384 status = do_open_fhandle(rqstp, &cstate->current_fh,
385 open);
386 if (status)
387 goto out;
388 break;
389 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
390 open->op_stateowner->so_confirmed = 1;
391 dprintk("NFSD: unsupported OPEN claim type %d\n",
392 open->op_claim_type);
393 status = nfserr_notsupp;
394 goto out;
395 default:
396 dprintk("NFSD: Invalid OPEN claim type %d\n",
397 open->op_claim_type);
398 status = nfserr_inval;
399 goto out;
400 }
401 /*
402 * nfsd4_process_open2() does the actual opening of the file. If
403 * successful, it (1) truncates the file if open->op_truncate was
404 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
405 */
406 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
407 out:
408 if (open->op_stateowner) {
409 nfs4_get_stateowner(open->op_stateowner);
410 cstate->replay_owner = open->op_stateowner;
411 }
412 nfs4_unlock_state();
413 return status;
414 }
415
416 /*
417 * filehandle-manipulating ops.
418 */
419 static __be32
420 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
421 struct svc_fh **getfh)
422 {
423 if (!cstate->current_fh.fh_dentry)
424 return nfserr_nofilehandle;
425
426 *getfh = &cstate->current_fh;
427 return nfs_ok;
428 }
429
430 static __be32
431 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
432 struct nfsd4_putfh *putfh)
433 {
434 fh_put(&cstate->current_fh);
435 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
436 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
437 putfh->pf_fhlen);
438 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
439 }
440
441 static __be32
442 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
443 void *arg)
444 {
445 __be32 status;
446
447 fh_put(&cstate->current_fh);
448 status = exp_pseudoroot(rqstp, &cstate->current_fh);
449 return status;
450 }
451
452 static __be32
453 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
454 void *arg)
455 {
456 if (!cstate->save_fh.fh_dentry)
457 return nfserr_restorefh;
458
459 fh_dup2(&cstate->current_fh, &cstate->save_fh);
460 return nfs_ok;
461 }
462
463 static __be32
464 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
465 void *arg)
466 {
467 if (!cstate->current_fh.fh_dentry)
468 return nfserr_nofilehandle;
469
470 fh_dup2(&cstate->save_fh, &cstate->current_fh);
471 return nfs_ok;
472 }
473
474 /*
475 * misc nfsv4 ops
476 */
477 static __be32
478 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
479 struct nfsd4_access *access)
480 {
481 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
482 return nfserr_inval;
483
484 access->ac_resp_access = access->ac_req_access;
485 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
486 &access->ac_supported);
487 }
488
489 static __be32
490 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
491 struct nfsd4_commit *commit)
492 {
493 u32 *p = (u32 *)commit->co_verf.data;
494 *p++ = nfssvc_boot.tv_sec;
495 *p++ = nfssvc_boot.tv_usec;
496
497 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
498 commit->co_count);
499 }
500
501 static __be32
502 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
503 struct nfsd4_create *create)
504 {
505 struct svc_fh resfh;
506 __be32 status;
507 dev_t rdev;
508
509 fh_init(&resfh, NFS4_FHSIZE);
510
511 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
512 NFSD_MAY_CREATE);
513 if (status)
514 return status;
515
516 status = check_attr_support(rqstp, cstate, create->cr_bmval,
517 nfsd_attrmask);
518 if (status)
519 return status;
520
521 switch (create->cr_type) {
522 case NF4LNK:
523 /* ugh! we have to null-terminate the linktext, or
524 * vfs_symlink() will choke. it is always safe to
525 * null-terminate by brute force, since at worst we
526 * will overwrite the first byte of the create namelen
527 * in the XDR buffer, which has already been extracted
528 * during XDR decode.
529 */
530 create->cr_linkname[create->cr_linklen] = 0;
531
532 status = nfsd_symlink(rqstp, &cstate->current_fh,
533 create->cr_name, create->cr_namelen,
534 create->cr_linkname, create->cr_linklen,
535 &resfh, &create->cr_iattr);
536 break;
537
538 case NF4BLK:
539 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
540 if (MAJOR(rdev) != create->cr_specdata1 ||
541 MINOR(rdev) != create->cr_specdata2)
542 return nfserr_inval;
543 status = nfsd_create(rqstp, &cstate->current_fh,
544 create->cr_name, create->cr_namelen,
545 &create->cr_iattr, S_IFBLK, rdev, &resfh);
546 break;
547
548 case NF4CHR:
549 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
550 if (MAJOR(rdev) != create->cr_specdata1 ||
551 MINOR(rdev) != create->cr_specdata2)
552 return nfserr_inval;
553 status = nfsd_create(rqstp, &cstate->current_fh,
554 create->cr_name, create->cr_namelen,
555 &create->cr_iattr,S_IFCHR, rdev, &resfh);
556 break;
557
558 case NF4SOCK:
559 status = nfsd_create(rqstp, &cstate->current_fh,
560 create->cr_name, create->cr_namelen,
561 &create->cr_iattr, S_IFSOCK, 0, &resfh);
562 break;
563
564 case NF4FIFO:
565 status = nfsd_create(rqstp, &cstate->current_fh,
566 create->cr_name, create->cr_namelen,
567 &create->cr_iattr, S_IFIFO, 0, &resfh);
568 break;
569
570 case NF4DIR:
571 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
572 status = nfsd_create(rqstp, &cstate->current_fh,
573 create->cr_name, create->cr_namelen,
574 &create->cr_iattr, S_IFDIR, 0, &resfh);
575 break;
576
577 default:
578 status = nfserr_badtype;
579 }
580
581 if (status)
582 goto out;
583
584 if (create->cr_acl != NULL)
585 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
586 create->cr_bmval);
587
588 fh_unlock(&cstate->current_fh);
589 set_change_info(&create->cr_cinfo, &cstate->current_fh);
590 fh_dup2(&cstate->current_fh, &resfh);
591 out:
592 fh_put(&resfh);
593 return status;
594 }
595
596 static __be32
597 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
598 struct nfsd4_getattr *getattr)
599 {
600 __be32 status;
601
602 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
603 if (status)
604 return status;
605
606 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
607 return nfserr_inval;
608
609 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
610 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
611 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
612
613 getattr->ga_fhp = &cstate->current_fh;
614 return nfs_ok;
615 }
616
617 static __be32
618 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
619 struct nfsd4_link *link)
620 {
621 __be32 status = nfserr_nofilehandle;
622
623 if (!cstate->save_fh.fh_dentry)
624 return status;
625 status = nfsd_link(rqstp, &cstate->current_fh,
626 link->li_name, link->li_namelen, &cstate->save_fh);
627 if (!status)
628 set_change_info(&link->li_cinfo, &cstate->current_fh);
629 return status;
630 }
631
632 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
633 {
634 struct svc_fh tmp_fh;
635 __be32 ret;
636
637 fh_init(&tmp_fh, NFS4_FHSIZE);
638 ret = exp_pseudoroot(rqstp, &tmp_fh);
639 if (ret)
640 return ret;
641 if (tmp_fh.fh_dentry == fh->fh_dentry) {
642 fh_put(&tmp_fh);
643 return nfserr_noent;
644 }
645 fh_put(&tmp_fh);
646 return nfsd_lookup(rqstp, fh, "..", 2, fh);
647 }
648
649 static __be32
650 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
651 void *arg)
652 {
653 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
654 }
655
656 static __be32
657 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
658 struct nfsd4_lookup *lookup)
659 {
660 return nfsd_lookup(rqstp, &cstate->current_fh,
661 lookup->lo_name, lookup->lo_len,
662 &cstate->current_fh);
663 }
664
665 static __be32
666 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
667 struct nfsd4_read *read)
668 {
669 __be32 status;
670
671 /* no need to check permission - this will be done in nfsd_read() */
672
673 read->rd_filp = NULL;
674 if (read->rd_offset >= OFFSET_MAX)
675 return nfserr_inval;
676
677 nfs4_lock_state();
678 /* check stateid */
679 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
680 RD_STATE, &read->rd_filp))) {
681 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
682 goto out;
683 }
684 if (read->rd_filp)
685 get_file(read->rd_filp);
686 status = nfs_ok;
687 out:
688 nfs4_unlock_state();
689 read->rd_rqstp = rqstp;
690 read->rd_fhp = &cstate->current_fh;
691 return status;
692 }
693
694 static __be32
695 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
696 struct nfsd4_readdir *readdir)
697 {
698 u64 cookie = readdir->rd_cookie;
699 static const nfs4_verifier zeroverf;
700
701 /* no need to check permission - this will be done in nfsd_readdir() */
702
703 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
704 return nfserr_inval;
705
706 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
707 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
708 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
709
710 if ((cookie == 1) || (cookie == 2) ||
711 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
712 return nfserr_bad_cookie;
713
714 readdir->rd_rqstp = rqstp;
715 readdir->rd_fhp = &cstate->current_fh;
716 return nfs_ok;
717 }
718
719 static __be32
720 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
721 struct nfsd4_readlink *readlink)
722 {
723 readlink->rl_rqstp = rqstp;
724 readlink->rl_fhp = &cstate->current_fh;
725 return nfs_ok;
726 }
727
728 static __be32
729 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
730 struct nfsd4_remove *remove)
731 {
732 __be32 status;
733
734 if (locks_in_grace())
735 return nfserr_grace;
736 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
737 remove->rm_name, remove->rm_namelen);
738 if (!status) {
739 fh_unlock(&cstate->current_fh);
740 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
741 }
742 return status;
743 }
744
745 static __be32
746 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
747 struct nfsd4_rename *rename)
748 {
749 __be32 status = nfserr_nofilehandle;
750
751 if (!cstate->save_fh.fh_dentry)
752 return status;
753 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
754 & NFSEXP_NOSUBTREECHECK))
755 return nfserr_grace;
756 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
757 rename->rn_snamelen, &cstate->current_fh,
758 rename->rn_tname, rename->rn_tnamelen);
759
760 /* the underlying filesystem returns different error's than required
761 * by NFSv4. both save_fh and current_fh have been verified.. */
762 if (status == nfserr_isdir)
763 status = nfserr_exist;
764 else if ((status == nfserr_notdir) &&
765 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
766 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
767 status = nfserr_exist;
768
769 if (!status) {
770 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
771 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
772 }
773 return status;
774 }
775
776 static __be32
777 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
778 struct nfsd4_secinfo *secinfo)
779 {
780 struct svc_fh resfh;
781 struct svc_export *exp;
782 struct dentry *dentry;
783 __be32 err;
784
785 fh_init(&resfh, NFS4_FHSIZE);
786 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
787 if (err)
788 return err;
789 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
790 secinfo->si_name, secinfo->si_namelen,
791 &exp, &dentry);
792 if (err)
793 return err;
794 if (dentry->d_inode == NULL) {
795 exp_put(exp);
796 err = nfserr_noent;
797 } else
798 secinfo->si_exp = exp;
799 dput(dentry);
800 if (cstate->minorversion)
801 /* See rfc 5661 section 2.6.3.1.1.8 */
802 fh_put(&cstate->current_fh);
803 return err;
804 }
805
806 static __be32
807 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
808 struct nfsd4_secinfo_no_name *sin)
809 {
810 __be32 err;
811
812 switch (sin->sin_style) {
813 case NFS4_SECINFO_STYLE4_CURRENT_FH:
814 break;
815 case NFS4_SECINFO_STYLE4_PARENT:
816 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
817 if (err)
818 return err;
819 break;
820 default:
821 return nfserr_inval;
822 }
823 exp_get(cstate->current_fh.fh_export);
824 sin->sin_exp = cstate->current_fh.fh_export;
825 fh_put(&cstate->current_fh);
826 return nfs_ok;
827 }
828
829 static __be32
830 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
831 struct nfsd4_setattr *setattr)
832 {
833 __be32 status = nfs_ok;
834
835 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
836 nfs4_lock_state();
837 status = nfs4_preprocess_stateid_op(cstate,
838 &setattr->sa_stateid, WR_STATE, NULL);
839 nfs4_unlock_state();
840 if (status) {
841 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
842 return status;
843 }
844 }
845 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);
846 if (status)
847 return status;
848 status = nfs_ok;
849
850 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
851 nfsd_attrmask);
852 if (status)
853 goto out;
854
855 if (setattr->sa_acl != NULL)
856 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
857 setattr->sa_acl);
858 if (status)
859 goto out;
860 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
861 0, (time_t)0);
862 out:
863 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);
864 return status;
865 }
866
867 static __be32
868 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
869 struct nfsd4_write *write)
870 {
871 stateid_t *stateid = &write->wr_stateid;
872 struct file *filp = NULL;
873 u32 *p;
874 __be32 status = nfs_ok;
875 unsigned long cnt;
876
877 /* no need to check permission - this will be done in nfsd_write() */
878
879 if (write->wr_offset >= OFFSET_MAX)
880 return nfserr_inval;
881
882 nfs4_lock_state();
883 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
884 if (filp)
885 get_file(filp);
886 nfs4_unlock_state();
887
888 if (status) {
889 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
890 return status;
891 }
892
893 cnt = write->wr_buflen;
894 write->wr_how_written = write->wr_stable_how;
895 p = (u32 *)write->wr_verifier.data;
896 *p++ = nfssvc_boot.tv_sec;
897 *p++ = nfssvc_boot.tv_usec;
898
899 status = nfsd_write(rqstp, &cstate->current_fh, filp,
900 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
901 &cnt, &write->wr_how_written);
902 if (filp)
903 fput(filp);
904
905 write->wr_bytes_written = cnt;
906
907 return status;
908 }
909
910 /* This routine never returns NFS_OK! If there are no other errors, it
911 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
912 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
913 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
914 */
915 static __be32
916 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
917 struct nfsd4_verify *verify)
918 {
919 __be32 *buf, *p;
920 int count;
921 __be32 status;
922
923 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
924 if (status)
925 return status;
926
927 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
928 if (status)
929 return status;
930
931 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
932 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
933 return nfserr_inval;
934 if (verify->ve_attrlen & 3)
935 return nfserr_inval;
936
937 /* count in words:
938 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
939 */
940 count = 4 + (verify->ve_attrlen >> 2);
941 buf = kmalloc(count << 2, GFP_KERNEL);
942 if (!buf)
943 return nfserr_jukebox;
944
945 status = nfsd4_encode_fattr(&cstate->current_fh,
946 cstate->current_fh.fh_export,
947 cstate->current_fh.fh_dentry, buf,
948 &count, verify->ve_bmval,
949 rqstp, 0);
950
951 /* this means that nfsd4_encode_fattr() ran out of space */
952 if (status == nfserr_resource && count == 0)
953 status = nfserr_not_same;
954 if (status)
955 goto out_kfree;
956
957 /* skip bitmap */
958 p = buf + 1 + ntohl(buf[0]);
959 status = nfserr_not_same;
960 if (ntohl(*p++) != verify->ve_attrlen)
961 goto out_kfree;
962 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
963 status = nfserr_same;
964
965 out_kfree:
966 kfree(buf);
967 return status;
968 }
969
970 static __be32
971 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
972 struct nfsd4_verify *verify)
973 {
974 __be32 status;
975
976 status = _nfsd4_verify(rqstp, cstate, verify);
977 return status == nfserr_not_same ? nfs_ok : status;
978 }
979
980 static __be32
981 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
982 struct nfsd4_verify *verify)
983 {
984 __be32 status;
985
986 status = _nfsd4_verify(rqstp, cstate, verify);
987 return status == nfserr_same ? nfs_ok : status;
988 }
989
990 /*
991 * NULL call.
992 */
993 static __be32
994 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
995 {
996 return nfs_ok;
997 }
998
999 static inline void nfsd4_increment_op_stats(u32 opnum)
1000 {
1001 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1002 nfsdstats.nfs4_opcount[opnum]++;
1003 }
1004
1005 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1006 void *);
1007 enum nfsd4_op_flags {
1008 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
1009 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1010 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
1011 /* For rfc 5661 section 2.6.3.1.1: */
1012 OP_HANDLES_WRONGSEC = 1 << 3,
1013 OP_IS_PUTFH_LIKE = 1 << 4,
1014 };
1015
1016 struct nfsd4_operation {
1017 nfsd4op_func op_func;
1018 u32 op_flags;
1019 char *op_name;
1020 /*
1021 * We use the DRC for compounds containing non-idempotent
1022 * operations, *except* those that are 4.1-specific (since
1023 * sessions provide their own EOS), and except for stateful
1024 * operations other than setclientid and setclientid_confirm
1025 * (since sequence numbers provide EOS for open, lock, etc in
1026 * the v4.0 case).
1027 */
1028 bool op_cacheresult;
1029 };
1030
1031 static struct nfsd4_operation nfsd4_ops[];
1032
1033 static const char *nfsd4_op_name(unsigned opnum);
1034
1035 /*
1036 * Enforce NFSv4.1 COMPOUND ordering rules:
1037 *
1038 * Also note, enforced elsewhere:
1039 * - SEQUENCE other than as first op results in
1040 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1041 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1042 * (Enforced in nfsd4_bind_conn_to_session().)
1043 * - DESTROY_SESSION must be the final operation in a compound, if
1044 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1045 * (Enforced in nfsd4_destroy_session().)
1046 */
1047 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1048 {
1049 struct nfsd4_op *op = &args->ops[0];
1050
1051 /* These ordering requirements don't apply to NFSv4.0: */
1052 if (args->minorversion == 0)
1053 return nfs_ok;
1054 /* This is weird, but OK, not our problem: */
1055 if (args->opcnt == 0)
1056 return nfs_ok;
1057 if (op->status == nfserr_op_illegal)
1058 return nfs_ok;
1059 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1060 return nfserr_op_not_in_session;
1061 if (op->opnum == OP_SEQUENCE)
1062 return nfs_ok;
1063 if (args->opcnt != 1)
1064 return nfserr_not_only_op;
1065 return nfs_ok;
1066 }
1067
1068 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1069 {
1070 return &nfsd4_ops[op->opnum];
1071 }
1072
1073 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1074 {
1075 return OPDESC(op)->op_cacheresult;
1076 }
1077
1078 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1079 {
1080 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1081 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1082 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1083 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1084 struct nfsd4_operation *thisd;
1085 struct nfsd4_operation *nextd;
1086
1087 thisd = OPDESC(this);
1088 /*
1089 * Most ops check wronsec on our own; only the putfh-like ops
1090 * have special rules.
1091 */
1092 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1093 return false;
1094 /*
1095 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1096 * put-filehandle operation if we're not going to use the
1097 * result:
1098 */
1099 if (argp->opcnt == resp->opcnt)
1100 return false;
1101
1102 nextd = OPDESC(next);
1103 /*
1104 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1105 * errors themselves as necessary; others should check for them
1106 * now:
1107 */
1108 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1109 }
1110
1111 /*
1112 * COMPOUND call.
1113 */
1114 static __be32
1115 nfsd4_proc_compound(struct svc_rqst *rqstp,
1116 struct nfsd4_compoundargs *args,
1117 struct nfsd4_compoundres *resp)
1118 {
1119 struct nfsd4_op *op;
1120 struct nfsd4_operation *opdesc;
1121 struct nfsd4_compound_state *cstate = &resp->cstate;
1122 int slack_bytes;
1123 __be32 status;
1124
1125 resp->xbuf = &rqstp->rq_res;
1126 resp->p = rqstp->rq_res.head[0].iov_base +
1127 rqstp->rq_res.head[0].iov_len;
1128 resp->tagp = resp->p;
1129 /* reserve space for: taglen, tag, and opcnt */
1130 resp->p += 2 + XDR_QUADLEN(args->taglen);
1131 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1132 resp->taglen = args->taglen;
1133 resp->tag = args->tag;
1134 resp->opcnt = 0;
1135 resp->rqstp = rqstp;
1136 resp->cstate.minorversion = args->minorversion;
1137 resp->cstate.replay_owner = NULL;
1138 resp->cstate.session = NULL;
1139 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1140 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1141 /*
1142 * Don't use the deferral mechanism for NFSv4; compounds make it
1143 * too hard to avoid non-idempotency problems.
1144 */
1145 rqstp->rq_usedeferral = 0;
1146
1147 /*
1148 * According to RFC3010, this takes precedence over all other errors.
1149 */
1150 status = nfserr_minor_vers_mismatch;
1151 if (args->minorversion > nfsd_supported_minorversion)
1152 goto out;
1153
1154 status = nfs41_check_op_ordering(args);
1155 if (status) {
1156 op = &args->ops[0];
1157 op->status = status;
1158 goto encode_op;
1159 }
1160
1161 while (!status && resp->opcnt < args->opcnt) {
1162 op = &args->ops[resp->opcnt++];
1163
1164 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1165 resp->opcnt, args->opcnt, op->opnum,
1166 nfsd4_op_name(op->opnum));
1167 /*
1168 * The XDR decode routines may have pre-set op->status;
1169 * for example, if there is a miscellaneous XDR error
1170 * it will be set to nfserr_bad_xdr.
1171 */
1172 if (op->status)
1173 goto encode_op;
1174
1175 /* We must be able to encode a successful response to
1176 * this operation, with enough room left over to encode a
1177 * failed response to the next operation. If we don't
1178 * have enough room, fail with ERR_RESOURCE.
1179 */
1180 slack_bytes = (char *)resp->end - (char *)resp->p;
1181 if (slack_bytes < COMPOUND_SLACK_SPACE
1182 + COMPOUND_ERR_SLACK_SPACE) {
1183 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1184 op->status = nfserr_resource;
1185 goto encode_op;
1186 }
1187
1188 opdesc = OPDESC(op);
1189
1190 if (!cstate->current_fh.fh_dentry) {
1191 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1192 op->status = nfserr_nofilehandle;
1193 goto encode_op;
1194 }
1195 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1196 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1197 op->status = nfserr_moved;
1198 goto encode_op;
1199 }
1200
1201 if (opdesc->op_func)
1202 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1203 else
1204 BUG_ON(op->status == nfs_ok);
1205
1206 if (!op->status && need_wrongsec_check(rqstp))
1207 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1208
1209 encode_op:
1210 /* Only from SEQUENCE */
1211 if (resp->cstate.status == nfserr_replay_cache) {
1212 dprintk("%s NFS4.1 replay from cache\n", __func__);
1213 status = op->status;
1214 goto out;
1215 }
1216 if (op->status == nfserr_replay_me) {
1217 op->replay = &cstate->replay_owner->so_replay;
1218 nfsd4_encode_replay(resp, op);
1219 status = op->status = op->replay->rp_status;
1220 } else {
1221 nfsd4_encode_operation(resp, op);
1222 status = op->status;
1223 }
1224
1225 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1226 args->ops, args->opcnt, resp->opcnt, op->opnum,
1227 be32_to_cpu(status));
1228
1229 if (cstate->replay_owner) {
1230 nfs4_put_stateowner(cstate->replay_owner);
1231 cstate->replay_owner = NULL;
1232 }
1233 /* XXX Ugh, we need to get rid of this kind of special case: */
1234 if (op->opnum == OP_READ && op->u.read.rd_filp)
1235 fput(op->u.read.rd_filp);
1236
1237 nfsd4_increment_op_stats(op->opnum);
1238 }
1239
1240 resp->cstate.status = status;
1241 fh_put(&resp->cstate.current_fh);
1242 fh_put(&resp->cstate.save_fh);
1243 BUG_ON(resp->cstate.replay_owner);
1244 out:
1245 /* Reset deferral mechanism for RPC deferrals */
1246 rqstp->rq_usedeferral = 1;
1247 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1248 return status;
1249 }
1250
1251 static struct nfsd4_operation nfsd4_ops[] = {
1252 [OP_ACCESS] = {
1253 .op_func = (nfsd4op_func)nfsd4_access,
1254 .op_name = "OP_ACCESS",
1255 },
1256 [OP_CLOSE] = {
1257 .op_func = (nfsd4op_func)nfsd4_close,
1258 .op_name = "OP_CLOSE",
1259 },
1260 [OP_COMMIT] = {
1261 .op_func = (nfsd4op_func)nfsd4_commit,
1262 .op_name = "OP_COMMIT",
1263 },
1264 [OP_CREATE] = {
1265 .op_func = (nfsd4op_func)nfsd4_create,
1266 .op_name = "OP_CREATE",
1267 .op_cacheresult = true,
1268 },
1269 [OP_DELEGRETURN] = {
1270 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1271 .op_name = "OP_DELEGRETURN",
1272 },
1273 [OP_GETATTR] = {
1274 .op_func = (nfsd4op_func)nfsd4_getattr,
1275 .op_flags = ALLOWED_ON_ABSENT_FS,
1276 .op_name = "OP_GETATTR",
1277 },
1278 [OP_GETFH] = {
1279 .op_func = (nfsd4op_func)nfsd4_getfh,
1280 .op_name = "OP_GETFH",
1281 },
1282 [OP_LINK] = {
1283 .op_func = (nfsd4op_func)nfsd4_link,
1284 .op_name = "OP_LINK",
1285 .op_cacheresult = true,
1286 },
1287 [OP_LOCK] = {
1288 .op_func = (nfsd4op_func)nfsd4_lock,
1289 .op_name = "OP_LOCK",
1290 },
1291 [OP_LOCKT] = {
1292 .op_func = (nfsd4op_func)nfsd4_lockt,
1293 .op_name = "OP_LOCKT",
1294 },
1295 [OP_LOCKU] = {
1296 .op_func = (nfsd4op_func)nfsd4_locku,
1297 .op_name = "OP_LOCKU",
1298 },
1299 [OP_LOOKUP] = {
1300 .op_func = (nfsd4op_func)nfsd4_lookup,
1301 .op_flags = OP_HANDLES_WRONGSEC,
1302 .op_name = "OP_LOOKUP",
1303 },
1304 [OP_LOOKUPP] = {
1305 .op_func = (nfsd4op_func)nfsd4_lookupp,
1306 .op_flags = OP_HANDLES_WRONGSEC,
1307 .op_name = "OP_LOOKUPP",
1308 },
1309 [OP_NVERIFY] = {
1310 .op_func = (nfsd4op_func)nfsd4_nverify,
1311 .op_name = "OP_NVERIFY",
1312 },
1313 [OP_OPEN] = {
1314 .op_func = (nfsd4op_func)nfsd4_open,
1315 .op_flags = OP_HANDLES_WRONGSEC,
1316 .op_name = "OP_OPEN",
1317 },
1318 [OP_OPEN_CONFIRM] = {
1319 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1320 .op_name = "OP_OPEN_CONFIRM",
1321 },
1322 [OP_OPEN_DOWNGRADE] = {
1323 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1324 .op_name = "OP_OPEN_DOWNGRADE",
1325 },
1326 [OP_PUTFH] = {
1327 .op_func = (nfsd4op_func)nfsd4_putfh,
1328 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1329 | OP_IS_PUTFH_LIKE,
1330 .op_name = "OP_PUTFH",
1331 },
1332 [OP_PUTPUBFH] = {
1333 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1334 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1335 | OP_IS_PUTFH_LIKE,
1336 .op_name = "OP_PUTPUBFH",
1337 },
1338 [OP_PUTROOTFH] = {
1339 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1340 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1341 | OP_IS_PUTFH_LIKE,
1342 .op_name = "OP_PUTROOTFH",
1343 },
1344 [OP_READ] = {
1345 .op_func = (nfsd4op_func)nfsd4_read,
1346 .op_name = "OP_READ",
1347 },
1348 [OP_READDIR] = {
1349 .op_func = (nfsd4op_func)nfsd4_readdir,
1350 .op_name = "OP_READDIR",
1351 },
1352 [OP_READLINK] = {
1353 .op_func = (nfsd4op_func)nfsd4_readlink,
1354 .op_name = "OP_READLINK",
1355 },
1356 [OP_REMOVE] = {
1357 .op_func = (nfsd4op_func)nfsd4_remove,
1358 .op_name = "OP_REMOVE",
1359 .op_cacheresult = true,
1360 },
1361 [OP_RENAME] = {
1362 .op_name = "OP_RENAME",
1363 .op_func = (nfsd4op_func)nfsd4_rename,
1364 .op_cacheresult = true,
1365 },
1366 [OP_RENEW] = {
1367 .op_func = (nfsd4op_func)nfsd4_renew,
1368 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1369 .op_name = "OP_RENEW",
1370 },
1371 [OP_RESTOREFH] = {
1372 .op_func = (nfsd4op_func)nfsd4_restorefh,
1373 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1374 | OP_IS_PUTFH_LIKE,
1375 .op_name = "OP_RESTOREFH",
1376 },
1377 [OP_SAVEFH] = {
1378 .op_func = (nfsd4op_func)nfsd4_savefh,
1379 .op_flags = OP_HANDLES_WRONGSEC,
1380 .op_name = "OP_SAVEFH",
1381 },
1382 [OP_SECINFO] = {
1383 .op_func = (nfsd4op_func)nfsd4_secinfo,
1384 .op_flags = OP_HANDLES_WRONGSEC,
1385 .op_name = "OP_SECINFO",
1386 },
1387 [OP_SETATTR] = {
1388 .op_func = (nfsd4op_func)nfsd4_setattr,
1389 .op_name = "OP_SETATTR",
1390 .op_cacheresult = true,
1391 },
1392 [OP_SETCLIENTID] = {
1393 .op_func = (nfsd4op_func)nfsd4_setclientid,
1394 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1395 .op_name = "OP_SETCLIENTID",
1396 .op_cacheresult = true,
1397 },
1398 [OP_SETCLIENTID_CONFIRM] = {
1399 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1400 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1401 .op_name = "OP_SETCLIENTID_CONFIRM",
1402 .op_cacheresult = true,
1403 },
1404 [OP_VERIFY] = {
1405 .op_func = (nfsd4op_func)nfsd4_verify,
1406 .op_name = "OP_VERIFY",
1407 },
1408 [OP_WRITE] = {
1409 .op_func = (nfsd4op_func)nfsd4_write,
1410 .op_name = "OP_WRITE",
1411 .op_cacheresult = true,
1412 },
1413 [OP_RELEASE_LOCKOWNER] = {
1414 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1415 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1416 .op_name = "OP_RELEASE_LOCKOWNER",
1417 },
1418
1419 /* NFSv4.1 operations */
1420 [OP_EXCHANGE_ID] = {
1421 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1422 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1423 .op_name = "OP_EXCHANGE_ID",
1424 },
1425 [OP_BIND_CONN_TO_SESSION] = {
1426 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1427 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1428 .op_name = "OP_BIND_CONN_TO_SESSION",
1429 },
1430 [OP_CREATE_SESSION] = {
1431 .op_func = (nfsd4op_func)nfsd4_create_session,
1432 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1433 .op_name = "OP_CREATE_SESSION",
1434 },
1435 [OP_DESTROY_SESSION] = {
1436 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1437 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1438 .op_name = "OP_DESTROY_SESSION",
1439 },
1440 [OP_SEQUENCE] = {
1441 .op_func = (nfsd4op_func)nfsd4_sequence,
1442 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1443 .op_name = "OP_SEQUENCE",
1444 },
1445 [OP_DESTROY_CLIENTID] = {
1446 .op_func = NULL,
1447 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1448 .op_name = "OP_DESTROY_CLIENTID",
1449 },
1450 [OP_RECLAIM_COMPLETE] = {
1451 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1452 .op_flags = ALLOWED_WITHOUT_FH,
1453 .op_name = "OP_RECLAIM_COMPLETE",
1454 },
1455 [OP_SECINFO_NO_NAME] = {
1456 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1457 .op_flags = OP_HANDLES_WRONGSEC,
1458 .op_name = "OP_SECINFO_NO_NAME",
1459 },
1460 [OP_TEST_STATEID] = {
1461 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1462 .op_flags = ALLOWED_WITHOUT_FH,
1463 .op_name = "OP_TEST_STATEID",
1464 },
1465 [OP_FREE_STATEID] = {
1466 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1467 .op_flags = ALLOWED_WITHOUT_FH,
1468 .op_name = "OP_FREE_STATEID",
1469 },
1470 };
1471
1472 static const char *nfsd4_op_name(unsigned opnum)
1473 {
1474 if (opnum < ARRAY_SIZE(nfsd4_ops))
1475 return nfsd4_ops[opnum].op_name;
1476 return "unknown_operation";
1477 }
1478
1479 #define nfsd4_voidres nfsd4_voidargs
1480 struct nfsd4_voidargs { int dummy; };
1481
1482 static struct svc_procedure nfsd_procedures4[2] = {
1483 [NFSPROC4_NULL] = {
1484 .pc_func = (svc_procfunc) nfsd4_proc_null,
1485 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1486 .pc_argsize = sizeof(struct nfsd4_voidargs),
1487 .pc_ressize = sizeof(struct nfsd4_voidres),
1488 .pc_cachetype = RC_NOCACHE,
1489 .pc_xdrressize = 1,
1490 },
1491 [NFSPROC4_COMPOUND] = {
1492 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1493 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1494 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1495 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1496 .pc_ressize = sizeof(struct nfsd4_compoundres),
1497 .pc_release = nfsd4_release_compoundargs,
1498 .pc_cachetype = RC_NOCACHE,
1499 .pc_xdrressize = NFSD_BUFSIZE/4,
1500 },
1501 };
1502
1503 struct svc_version nfsd_version4 = {
1504 .vs_vers = 4,
1505 .vs_nproc = 2,
1506 .vs_proc = nfsd_procedures4,
1507 .vs_dispatch = nfsd_dispatch,
1508 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1509 };
1510
1511 /*
1512 * Local variables:
1513 * c-basic-offset: 8
1514 * End:
1515 */
linux-next